4ZXQ:
reference: Structural plasticity of the protein plug that traps newly packaged genomes in podoviridae virions., Bhardwaj A, Sankhala RS, Olia AS, Brooke D, Casjens SR, Taylor DJ, Prevelige PE Jr, Cingolani G, J Biol Chem. 2015 Nov 16. pii: jbc.M115.696260. PMID: 26574546

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